Injection mold capable of positioning and pressing embedded part
Through the combined design of movable and insertion needles, the appearance defects of plastic parts caused by the positioning of embedded parts are solved, and the accurate positioning and appearance aesthetics of embedded parts are achieved. At the same time, the mold structure is simplified and the cost is reduced.
Patent Information
- Application Number
- CN202422521315.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-18
AI Technical Summary
In the process of burying and forming plastic parts, when positioning the embedded parts, it is easy to cause product appearance defects, affect the beauty and increase mold cost.
The movable insert needle and the insert needle are combined design. The movable insert needle is squeezed to move it toward each other through the insert needle, fixing the embedded part, and at the same time, limiting holes are set on the movable insert needle to limit the movable distance to ensure accurate positioning and unbiased positioning.
The precise positioning of the embedded parts is achieved without bias and does not affect the appearance of the plastic parts, simplifying the mold structure and reducing costs.
Smart Images
Figure CN223290178U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mold injection, in particular to an injection mold capable of positioning and pressing an embedded part. Background Art
[0002] The injection molding process for embedding plastic parts involves placing the embedded part in the mold before injection molding, followed by filling and molding. Currently, to ensure the embedded part is accurately positioned and non-deflected within the injection molded part, a fixed positioning structure is typically provided on the injection mold. However, this compromises the appearance of the plastic product. For example, a resting point or a slider is typically added to the male and female mold surfaces of the mold to position the embedded part. If a resting point is designed on the male and female mold surfaces, the resulting plastic product will have resting points, affecting the product's appearance. If a slider is added to the male and female mold surfaces, the resulting plastic product will have a slider joining line, which not only affects the product's appearance but also increases mold cost. Therefore, the existing methods for positioning embedded parts to ensure their accurate and non-deflected position within the injection molded part leave traces on the surface of the molded plastic product, affecting the aesthetics of the plastic product and limiting the design of its exterior design. Summary of the Invention
[0003] In view of this, the present invention provides an injection mold capable of positioning and pressing an embedded part, so as to solve the problems existing in the above-mentioned background technology.
[0004] An injection mold capable of positioning and pressing an embedded part comprises a male mold and a female mold corresponding to the male mold, wherein at least one embedded part is arranged in the injection mold cavity formed between the male mold and the female mold.
[0005] Wherein, at least one group of movable inlay pins is arranged transversely in the male mold, and two movable inlay pins in the same group are respectively located on both sides of the embedded part;
[0006] A plurality of insertable pins are longitudinally arranged in the female mold. The insertable pins are used to sequentially insert the female mold and the male mold downwards and squeeze the movable pins located on the adjacent side thereof during the insertion process of the male mold so that the two movable pins in the same group move toward each other, thereby fixing the embedded parts.
[0007] Preferably, both ends of the movable inserting pin are provided with chamfers or bevels for decomposing the vertical extrusion force of the inserted inserting pin into a horizontal force to move the movable inserting pin.
[0008] Preferably, a limiting hole is further provided on the movable inlay pin, and a limiting piece is provided in the male mold, which is inserted into the limiting hole from the side to limit the movable distance of the movable inlay pin.
[0009] Preferably, the limiting hole is a bottom-opening hole, and the diameter of the limiting hole is 0.2±0.02 mm larger than the diameter of the limiting member.
[0010] Preferably, the lower end of the insertable pin is provided with a chamfer.
[0011] Preferably, the inclination of the chamfer angle at the lower end of the insertable pin is 10±5 degrees.
[0012] Preferably, a movable pinhole is arranged horizontally in the male mold, and a male mold insertion pinhole and a male mold embedding hole are arranged vertically. The male mold insertion pinhole and the male mold embedding hole are arranged at intervals and are both connected to the movable pinhole;
[0013] The female mold is vertically provided with a female mold insertion pinhole and a female mold embedding hole. The setting position of the female mold insertion pinhole corresponds to the setting position of the male mold insertion pinhole, and the setting position of the female mold embedding hole corresponds to the setting position of the male mold embedding hole.
[0014] Preferably, the number of the inserted type pins is one more than the number of the movable type pins.
[0015] The beneficial effects of the utility model are:
[0016] 1. The present application adds at least one insertable pin to the female mold and at least one group of movable pins to the male mold, and the two movable pins in the same group are respectively located on both sides of the embedded part. When the insertable pin is inserted into the female mold and the male mold, the squeezing force on the movable pin located on the adjacent side is utilized to move the two movable pins in the same group toward each other and thus fix the embedded part. While achieving fixed positioning of the embedded part in the production of the embedded part injection mold, it will not affect the appearance of the molded plastic part, and fundamentally solves the problem of the mold structure affecting the product appearance ID. Moreover, this design will not increase the structural difficulty of the mold, but will greatly simplify the mold structure, thereby meeting the customer's demand for product appearance ID.
[0017] 2. In order to prevent the movable pin from moving too far when squeezed by the inserted pin, which may cause the movable pin to be unable to return to its original position after the mold is opened and the movable pin is freed from the restraining pressure of the inserted pin, the present application effectively solves this problem by adding a limiting hole to the movable pin and arranging a limiting member in the male mold that is inserted into the limiting hole from the side to limit the movable distance of the movable pin.
[0018] 3. The mold of the present application can fix the embedded parts without sacrificing the appearance ID of the plastic product, and can ensure that the embedded parts are accurately positioned and not offset in the injection molded parts, which not only ensures the molding quality of the plastic parts, but also ensures the appearance of the plastic parts. In addition, the mold has a simple structure, low production cost and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0020] Figure 1 This is a schematic diagram of the male and female molds when opening.
[0021] Figure 2 It is a schematic diagram of the male and female molds when closing or closing the mold.
[0022] Figure 3 It is a structural diagram of the male mold.
[0023] Figure 4 It is a schematic diagram of the structure of the master mold.
[0024] Figure 5 It is a structural diagram of an insertable pin.
[0025] Figure 6 This is one of the structural diagrams of the movable inlay pin.
[0026] Figure 7 This is the second structural diagram of the movable inlay pin.
[0027] Figure 8 It is a schematic diagram of the connection between the movable inlay pin and the limiting part in the male mold.
[0028] Figure 9 It is a schematic diagram of the connection between the movable inlay pin and the limiting part in the male mold.
[0029] Figure 10 It is a partial enlarged view of the embedded parts being fixed after the male and female molds are closed or clamped.
[0030] The meanings of the numbers in the figure are:
[0031] 1 is the female mold, 2 is the male mold, 3 is the embedded part, 4 is the movable pin, 5 is the inserted pin, 6 is the limiting hole, 7 is the limiting part, 8 is the movable distance, 9 is the movable pin hole, 10 is the male mold insertion pin hole, 11 is the male mold embedded hole, 12 is the female mold insertion pin hole, and 13 is the female mold embedded hole. DETAILED DESCRIPTION
[0032] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments illustrated in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.
[0033] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0034] In order to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings.
[0035] The utility model provides an injection mold capable of positioning and pressing an embedded part, comprising a male mold 2 and a female mold 1 corresponding to the male mold 2. At least one embedded part 3 is arranged in the injection cavity formed between the male mold 2 and the female mold 1.
[0036] Among them, at least one group of movable insert pins 4 is arranged transversely in the male mold 2, and two movable insert pins in the same group are respectively located on both sides of the embedded part 3;
[0037] A plurality of insertable pins 5 are longitudinally arranged in the female mold 1. The insertable pins 5 are used to sequentially insert the female mold 1 and the male mold 2 downwards and, during the insertion into the male mold 2, squeeze the movable pins 4 located on the adjacent side thereof to move the two movable pins in the same group toward each other, thereby fixing the embedded part 3.
[0038] Specifically, a movable pinhole 9 is horizontally arranged in the male mold 2, and a male mold insertion pinhole 10 and a male mold embedding hole 11 are vertically arranged. The male mold insertion pinhole 10 and the male mold embedding hole 11 are arranged at intervals and are both connected with the movable pinhole 9; a female mold insertion pinhole 12 and a female mold embedding hole 13 are vertically arranged in the female mold 1. After the male mold 2 and the female mold 1 are combined into one, the setting position of the female mold insertion pinhole 12 corresponds to the setting position of the male mold insertion pinhole 10, and the female mold insertion pinhole 12 is connected with the male mold insertion pinhole 10, the setting position of the female mold embedding hole 13 corresponds to the setting position of the male mold embedding hole 11, and the female mold embedding hole 13 is connected with the male mold embedding hole 11. When the insertable pin 5 is not inserted into the female mold insertion pin hole 12 of the female mold 1, the opposite ends of the two movable pins located in different groups but adjacent to each other slightly extend into the male mold insertion pin hole 10, but the opposite ends of the two movable pins maintain a certain distance and do not touch.
[0039] The male mold embedding hole 11 and the female mold embedding hole 13 are holes for accommodating the embedded component 3. The embedded component 3 is placed directly within the male mold embedding hole 11. However, when the male mold embedding hole 11 and the female mold embedding hole 13 align, a portion of the head of the embedded component 3 is placed within the female mold embedding hole 13. After the male mold embedding hole 11 and the female mold embedding hole 13 align, the area formed between the two holes becomes the injection cavity. The injection molding liquid enters the injection cavity through the injection hole in the mold and can envelop the head of the embedded component 3. When the injection molding liquid solidifies, it merges with the embedded component to form a plastic part.
[0040] Both ends of the movable pin 4 are provided with chamfers or bevels for decomposing the vertical extrusion force of the inserted pin 5 into a horizontal force to move the movable pin. In this embodiment, both ends of the movable pin 4 are provided with chamfers or bevels with a length of about 0.3-1.0 mm.
[0041] The lower end of the insert pin 5 is provided with a chamfered angle, and the slope of the chamfered angle is 10±5 degrees.
[0042] When the mold is closed, a certain inserted pin 5 is inserted into the female mold insertion pin hole 12 of the female mold 1. When the lower end of the inserted pin 5 extends into the male mold insertion pin hole 10 of the male mold 2 and contacts the two movable pins 4 located in different groups but adjacent thereto, since the lower end of the inserted pin 5 is provided with a chamfer and both ends of the movable pin 4 are also provided with chamfers or bevels, the chamfers at the lower end of the inserted pin 5 contact the inclined surfaces of the chamfers or bevels at the ends of the movable pin 4. Therefore, the vertical extrusion force generated by the downward insertion of the inserted pin 5 will decompose into a horizontal force, so that the two movable pins located in different groups but adjacent to each other are contacted. The needles 4 move horizontally in opposite directions. In this way, when all the inserted pins 5 are inserted into the corresponding mother mold insertion pin holes 12 at the same time, the two movable pins 4 located in different groups but adjacent to each other on both sides of each inserted pin 5 will move synchronously in opposite directions, that is, the two movable pins in the same group will move toward each other, thereby clamping the embedded part between the two movable pins in the same group, thereby achieving fixed positioning of the embedded part 3. The interference preload of the embedded part 3 is generally designed to be 0.03-0.1mm to prevent the embedded part 3 from moving up and down during the injection molding process and to avoid the embedded part 3 from being offset.
[0043] After the injection molding is completed and the mold is opened, the inserted pin 5 is pulled out upward. After the inserted pin 5 slides out of the male mold insertion pin hole 10 of the male mold 2, the inserted pin 5 is disengaged from the movable pin 4. The thrust exerted by the inserted pin 5 on the movable pin 4 disappears, and the positioning pressure exerted by the movable pin 4 on the embedded part 3 disappears. At this time, the embedded part 3 can be ejected and removed freely, and the appearance of the molded plastic part has no defects.
[0044] The number of the inserted pins 5 is one more than the number of the movable pins 4, and the number of the movable pins 4 is the same as the number of the embedded parts 3. Figure 1 、 2 As shown, in this embodiment, three insertable pins 5 are inserted into the female mold 1, and two injection cavities are formed between the male mold and the female mold 1. An embedded part is provided in each injection cavity, and a movable pin 4 is provided on both sides of each embedded part, that is, two groups of movable pins 4 are provided. Taking the movement of the first group of movable pins 4 from the left or the positioning of the first embedded part 3 as an example, when the first and second inserted pins 5 from the left are inserted into their corresponding mother mold insertion pin holes 12 at the same time, the first inserted pin from the left squeezes the movable pin 4 located on the left side of the first embedded part, causing the movable pin 4 to move to the right, and the second inserted pin from the left squeezes the movable pin 4 located on the right side of the first embedded part, causing the movable pin 4 to move to the left. In this way, the two movable pins 4 of the first group move toward each other, thereby clamping and fixing the first embedded part 3; when the mold is opened, the first and second inserted pins 5 from the left are pulled out upward, and the two movable pins 4 of the first group are free from the restraining pressure of the inserted pins 5. At this time, the embedded part 3 can be ejected and removed freely.
[0045] In order to prevent the movable pin 4 from moving too far when being squeezed by the inserted pin 5, which may cause the movable pin 4 to be unable to return to its original position after being released from the restraining pressure of the inserted pin 5 after the mold is opened, a limiting hole 6 is additionally provided on the movable pin 4, and a limiting member 7 is provided in the male mold 2, which is inserted into the limiting hole 6 from the side to limit the movable distance 8 of the movable pin.
[0046] In this embodiment, the limiting hole 6 is an open hole with a downward opening, the limiting member 7 is a positioning pin, and the diameter of the limiting hole is 0.2±0.02 mm larger than the diameter of the limiting member 7, that is, when the movable pin 4 is squeezed by the inserted pin 5, the movable distance 8 of the movable pin 4 is 0.2±0.02 mm.
[0047] The present application adds at least one insertable pin 5 to the female mold and at least one group of movable pins 4 to the male mold, and the two movable pins in the same group are respectively located on both sides of the embedded part. When the insertable pin is inserted into the female mold and the male mold, the squeezing force on the movable pin 4 located on the adjacent side is utilized to move the two movable pins in the same group toward each other and thus fix the embedded part. While achieving fixed positioning of the embedded part in the production of the embedded part injection mold, it will not affect the appearance of the molded plastic part, and fundamentally solves the problem of the mold structure affecting the product appearance ID. Moreover, this design will not increase the structural difficulty of the mold, but will greatly simplify the mold structure, and meet the customer's demand for product appearance ID.
[0048] The mold structure of the present application has been verified through mass production tests, proving its reliability and stability. Therefore, the embedded part fixing and positioning structure has strong promotional potential.
[0049] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
Claims
1. An injection mold capable of positioning and pressing an embedded part, characterized in that: The invention comprises a male mold (2) and a female mold (1) corresponding to the male mold (2), wherein at least one embedded part (3) is provided in the injection molding cavity formed between the male mold (2) and the female mold (1). Wherein, at least one group of movable insert pins (4) is transversely arranged in the male mold (2), and two movable insert pins in the same group are respectively located on both sides of the embedded part (3); A plurality of insertable pins (5) are longitudinally arranged in the female mold (1). The insertable pins (5) are used to sequentially insert downwards into the female mold (1) and the male mold (2). During the insertion into the male mold (2), the insertable pins (5) squeeze the movable pins (4) located on the adjacent side thereof so that two movable pins in the same group move toward each other, thereby fixing the embedded part (3).
2. The injection mold capable of positioning and pressing the embedded part according to claim 1, characterized in that: Both ends of the movable inserting pin (4) are provided with chamfers or bevels for decomposing the vertical extrusion force of the inserted inserting pin (5) into a horizontal force to enable the movable inserting pin to move.
3. The injection mold capable of positioning and pressing the embedded part according to claim 1 or 2, characterized in that: The movable inlay pin (4) is also provided with a limiting hole (6), and the male mold (2) is provided with a limiting piece (7) which is inserted into the limiting hole (6) from the side to limit the movable distance (8) of the movable inlay pin.
4. The injection mold capable of positioning and pressing the embedded part according to claim 3, characterized in that: The limiting hole (6) is a bottom-opening hole, and the diameter of the limiting hole is 0.2±0.02 mm larger than the diameter of the limiting member (7).
5. The injection mold capable of positioning and pressing the embedded part according to claim 1, characterized in that: The lower end of the inserted pin (5) is provided with a chamfered angle.
6. The injection mold capable of positioning and pressing the embedded part according to claim 5, characterized in that: The inclination of the chamfer angle at the lower end of the inserted pin (5) is 10±5 degrees.
7. The injection mold capable of positioning and pressing an embedded part according to claim 1, characterized in that: The male mold (2) is provided with a movable pinhole (9) in the horizontal direction, and a male mold insertion pinhole (10) and a male mold embedding hole (11) in the vertical direction. The male mold insertion pinhole (10) and the male mold embedding hole (11) are arranged at intervals and are both connected to the movable pinhole (9). A female mold insertion pinhole (12) and a female mold embedding hole (13) are vertically arranged in the female mold (1); the setting position of the female mold insertion pinhole (12) corresponds to the setting position of the male mold insertion pinhole (10); and the setting position of the female mold embedding hole (13) corresponds to the setting position of the male mold embedding hole (11).
8. The injection mold capable of positioning and pressing an embedded part according to claim 1, characterized in that: The number of the inserted type inserting pins (5) is one more than the number of the movable type inserting pins (4).